MPE/iX update from Mark Bixby.

p4raw-id: //depot/perl@15483

2 files changed, 457 insertions, 0 deletions

diff --git a/mpeix/mpeix.c b/mpeix/mpeix.c
new file mode 100644
index 0000000000..7ad8eb2e83
--- /dev/null
+++ b/mpeix/mpeix.c
@@ -0,0 +1,444 @@
+
+/*
+ * gcc long pointer support code for HPPA.
+ * Copyright 1998, DIS International, Ltd.
+ * Permission is granted to use this code under the GNU LIBRARY GENERAL
+ * PUBLIC LICENSE, Version 2, June 1991.
+ */
+typedef struct {
+  int           spaceid;
+  unsigned int  offset;
+  } LONGPOINTER, longpointer;
+
+/*
+ * gcc long pointer support code for HPPA.
+ * Copyright 1998, DIS International, Ltd.
+ * Permission is granted to use this code under the GNU LIBRARY GENERAL
+ * PUBLIC LICENSE, Version 2, June 1991.
+ */
+
+int __perl_mpe_getspaceid(void *source)
+  {
+  int val;
+  /*
+   * Given the short pointer, determine it's space ID.
+   */
+
+  /*
+   * The colons separate output from input parameters. In this case,
+   * the output of the instruction (output indicated by the "=" in the
+   * constraint) is to a memory location (indicated by the "m"). The
+   * input constraint indicates that the source to the instruction
+   * is a register reference (indicated by the "r").
+   * The general format is:
+   *   asm("<instruction template>" : <output> : <input> : <clobbers>);
+   *     where <output> and <input> are:
+   *       "<constraint>" (<token>)
+   *     <instruction template> is the PA-RISC instruction in template fmt.
+   *     <clobbers> indicates those registers clobbered by the instruction
+   *     and provides hints to the optimizer.
+   *
+   * Refer to the gcc documentation or http://www.dis.com/gnu/gcc_toc.html
+   */
+  asm volatile (
+      "comiclr,= 0,%1,%%r28;
+         ldsid (%%r0,%1),%%r28;
+       stw %%r28, %0"
+                        : "=m" (val)    // Output to val
+                        : "r" (source)  // Source must be gen reg
+                        : "%r28");      // Clobbers %r28
+  return (val);
+  };
+
+LONGPOINTER __perl_mpe_longaddr(void *source)
+  {
+  LONGPOINTER lptr;
+  /*
+   * Return the long pointer for the address in sr5 space.
+   */
+
+  asm volatile (
+      "comiclr,= 0,%2,%%r28;
+         ldsid (%%r0,%2),%%r28;
+       stw %%r28, %0;
+       stw %2, %1"
+                        : "=m" (lptr.spaceid),
+                          "=m" (lptr.offset)    // Store to lptr
+                        : "r" (source)          // Source must be gen reg
+                        : "%r28");      // Clobbers %r28
+  return (lptr);
+  };
+
+LONGPOINTER __perl_mpe_addtopointer(LONGPOINTER source,    // %r26 == source offset
+                                                // %r25 == source space
+                        int             len)    // %r24 == length in bytes
+  {
+  /*
+   * Increment a longpointer.
+   */
+
+  asm volatile (
+      "copy %0,%%r28;                           // copy space to r28
+       add %1,%2,%%r29"                         // Increment the pointer
+                        :                       // No output
+                        : "r" (source.spaceid), // Source address
+                          "r" (source.offset),
+                          "r" (len)             // Length
+                        : "%r28",               // Clobbers
+                          "%r29");
+  };
+
+void __perl_mpe_longmove(int len,                  // %r26 == byte length
+              LONGPOINTER source,       // %r23 == source space, %r24 == off
+              LONGPOINTER target)       // sp-#56 == target space, sp-#52== off
+  {
+  /*
+   * Move data between two buffers in long pointer space.
+   */
+
+  asm volatile (
+      ".import $$lr_unk_unk_long,MILLICODE;
+       mtsp %0,%%sr1;                           // copy source space to sr1
+       copy %1,%%r26;                           // load source offset to r26
+       copy %4,%%r24;                           // load length to r24
+       copy %3,%%r25;                           // load target offset to r25
+       bl $$lr_unk_unk_long,%%r31;              // start branch to millicode
+       mtsp %2,%%sr2"                           // copy target space to sr2
+                        :                       // No output
+                        : "r" (source.spaceid), // Source address
+                          "r" (source.offset),
+                          "r" (target.spaceid), // Target address
+                          "r" (target.offset),
+                          "r" (len)             // Byte length
+                        : "%r1",                // Clobbers
+                          "%r24",
+                          "%r25",
+                          "%r26",
+                          "%r31");
+  };
+
+int __perl_mpe_longpeek(LONGPOINTER source)
+  {
+  /*
+   * Fetch the int in long pointer space.
+   */
+  unsigned int val;
+
+  asm volatile (
+      "mtsp %1, %%sr1;
+       copy %2, %%r28;
+       ldw 0(%%sr1, %%r28), %%r28;
+       stw %%r28, %0"
+                        : "=m" (val)            // Output val
+                        : "r" (source.spaceid), // Source space ID
+                          "r" (source.offset)   // Source offset
+                        : "%r28");              // Clobbers %r28
+
+  return (val);
+  };
+
+void __perl_mpe_longpoke(LONGPOINTER target,       // %r25 == spaceid, %r26 == offset
+          unsigned int val)             // %r24 == value
+  {
+  /*
+   * Store the val into long pointer space.
+   */
+  asm volatile (
+      "mtsp %0,%%sr1;
+       copy %1, %%r28;
+       stw %2, 0(%%sr1, %%r28)"
+                        :                       // No output
+                        : "r" (target.spaceid), // Target space ID
+                          "r" (target.offset),  // Target offset
+                          "r" (val)             // Value to store
+                        : "%r28"                // Clobbers %r28
+                        );                      // Copy space to %sr1
+  };
+
+void __perl_mpe_move_fast(int len,                 // %r26 == byte length
+               void *source,            // %r25 == source addr
+               void *target)            // %r24 == target addr
+  {
+  /*
+   * Move using short pointers.
+   */
+  asm volatile (
+      ".import $$lr_unk_unk,MILLICODE;
+       copy %1, %%r26;                          // Move source addr into pos
+       copy %2, %%r25;                          // Move target addr into pos
+       bl $$lr_unk_unk,%%r31;                   // Start branch to millicode
+       copy %0, %%r24"                          // Move length into position
+                        :                       // No output
+                        : "r" (len),            // Byte length
+                          "r" (source),         // Source address
+                          "r" (target)          // Target address
+                        : "%r24",               // Clobbers
+                          "%r25",
+                          "%r26",
+                          "%r31");
+  };
+
+/*
+ * ftruncate - set file size, BSD Style
+ *
+ * shortens or enlarges the file as neeeded
+ * uses some undocumented locking call. It is known to work on SCO unix,
+ * other vendors should try.
+ * The #error directive prevents unsupported OSes
+ */
+
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <mpe.h>
+
+extern void FCONTROL(short, short, longpointer);
+extern void PRINTFILEINFO(int);
+
+int ftruncate(int fd, long wantsize);
+
+int ftruncate(int fd, long wantsize) {
+
+int ccode_return,dummy=0;
+
+if (lseek(fd, wantsize, SEEK_SET) < 0) {
+        return (-1);
+}
+
+FCONTROL(_mpe_fileno(fd),6,__perl_mpe_longaddr(&dummy)); /* Write new EOF */
+if ((ccode_return=ccode()) != CCE) {
+        fprintf(stderr,"MPE ftruncate failed, ccode=%d, wantsize=%ld\n",ccode_return,wantsize);
+        PRINTFILEINFO(_mpe_fileno(fd));
+	errno = ESYSERR;
+	return (-1);
+}
+
+return (0);
+}
+
+/*
+   wrapper for truncate():
+
+   truncate() is UNIX, not POSIX.
+
+   This function requires ftruncate().
+
+
+
+   NAME
+      truncate -
+
+   SYNOPSIS
+      #include <unistd.h>
+
+      int truncate(const char *pathname, off_t length);
+
+                                             Returns: 0 if OK, -1 on error
+
+            from: Stevens' Advanced Programming in the UNIX Environment, p. 92
+
+
+
+   ERRORS
+      EACCES
+      EBADF
+      EDQUOT (not POSIX)    <- not implemented here
+      EFAULT
+      EINVAL
+      EISDIR
+      ELOOP (not POSIX)     <- not implemented here
+      ENAMETOOLONG
+      ENOTDIR
+      EROFS
+      ETXTBSY (not POSIX)   <- not implemented here
+
+                                          from: HP-UX man page
+
+
+
+   Compile directives:
+      PRINT_ERROR - make this function print an error message to stderr
+*/
+
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE
+#endif
+
+#include <sys/types.h>	/* off_t, required by open() */
+#include <sys/stat.h>	/* required by open() */
+#include <fcntl.h>	/* open() */
+#include <unistd.h>	/* close() */
+#include <stdio.h>	/* perror(), sprintf() */
+
+
+
+int
+truncate(const char *pathname, off_t length)
+{
+	int fd;
+#ifdef PRINT_ERROR
+	char error_msg[80+1];
+#endif
+
+	if (length == 0)
+	{
+		if ( (fd = open(pathname, O_WRONLY | O_TRUNC)) < 0)
+		{
+			/* errno already set */
+#ifdef PRINT_ERROR
+			sprintf(error_msg,
+			        "truncate(): open(%s, O_WRONLY | OTRUNC)\0",
+			        pathname);
+			perror(error_msg);
+#endif
+			return -1;
+		}
+	}
+	else
+	{
+		if ( (fd = open(pathname, O_WRONLY)) < 0)
+		{
+			/* errno already set */
+#ifdef PRINT_ERROR
+			sprintf(error_msg,
+			        "truncate(): open(%s, O_WRONLY)\0",
+			        pathname);
+			perror(error_msg);
+#endif
+			return -1;
+		}
+
+		if (ftruncate(fd, length) < 0)
+		{
+			/* errno already set */
+#ifdef PRINT_ERROR
+			perror("truncate(): ftruncate()");
+#endif
+			return -1;
+		}
+	}
+
+	if (close(fd) < 0)
+	{
+		/* errno already set */
+#ifdef PRINT_ERROR
+		perror("truncate(): close()");
+#endif
+		return -1;
+	}
+
+	return 0;
+} /* truncate() */
+
+/* 
+   wrapper for gettimeofday():
+      gettimeofday() is UNIX, not POSIX.
+      gettimeofday() is a BSD function.
+
+
+
+   NAME
+      gettimeofday -
+
+   SYNOPSIS
+      #include <sys/time.h>
+
+      int gettimeofday(struct timeval *tp, struct timezone *tzp);
+
+   DESCRIPTION
+      This function returns seconds and microseconds since midnight
+      January 1, 1970. The microseconds is actually only accurate to
+      the millisecond.
+
+      Note: To pick up the definitions of structs timeval and timezone
+            from the <time.h> include file, the directive
+            _SOCKET_SOURCE must be used.
+
+   RETURN VALUE
+      A 0 return value indicates that the call succeeded.  A -1 return
+      value indicates an error occurred; errno is set to indicate the
+      error.
+
+   ERRORS
+      EFAULT     not implemented
+
+   Changes:
+      2-91    DR.  Created.
+*/
+
+
+/* need _SOCKET_SOURCE to pick up structs timeval and timezone in time.h */
+#ifndef _SOCKET_SOURCE
+# define _SOCKET_SOURCE
+#endif
+
+#include <time.h>	/* structs timeval & timezone,
+				difftime(), localtime(), mktime(), time() */
+#include <sys/time.h>	/* gettimeofday() */
+
+extern int TIMER();
+
+
+
+#ifdef __STDC__
+int gettimeofday( struct timeval *tp, struct timezone *tpz )
+#else
+int gettimeofday(  tp, tpz )
+struct timeval  *tp;
+struct timezone *tpz;
+#endif
+{
+   static unsigned long    basetime        = 0;
+   static int              dsttime         = 0;
+   static int              minuteswest     = 0;
+   static int              oldtime         = 0;
+   register int            newtime;
+
+
+   /*-------------------------------------------------------------------*/
+   /* Setup a base from which all future time will be computed.         */
+   /*-------------------------------------------------------------------*/
+   if ( basetime == 0 )
+   {
+      time_t    gmt_time;
+      time_t    loc_time;
+      struct tm *loc_time_tm;
+
+      gmt_time    = time( NULL );
+      loc_time_tm = localtime( &gmt_time ) ;
+      loc_time    = mktime( loc_time_tm );
+
+      oldtime     = TIMER();
+      basetime    = (unsigned long) ( loc_time - (oldtime/1000) );
+
+      /*----------------------------------------------------------------*/
+      /* The calling process must be restarted if timezone or dst       */
+      /* changes.                                                       */
+      /*----------------------------------------------------------------*/
+      minuteswest = (int) (difftime( loc_time, gmt_time ) / 60);
+      dsttime     = loc_time_tm->tm_isdst;
+   }
+
+   /*-------------------------------------------------------------------*/
+   /* Get the new time value. The timer value rolls over every 24 days, */
+   /* so if the delta is negative, the basetime value is adjusted.      */
+   /*-------------------------------------------------------------------*/
+   newtime = TIMER();
+   if ( newtime < oldtime )  basetime += 2073600;
+   oldtime = newtime;
+
+   /*-------------------------------------------------------------------*/
+   /* Return the timestamp info.                                        */
+   /*-------------------------------------------------------------------*/
+   tp->tv_sec          = basetime + newtime/1000;
+   tp->tv_usec         = (newtime%1000) * 1000;   /* only accurate to milli */
+   if (tpz)
+   {
+      tpz->tz_minuteswest = minuteswest;
+      tpz->tz_dsttime     = dsttime;
+   }
+
+   return 0;
+
+} /* gettimeofday() */
diff --git a/mpeix/mpeixish.h b/mpeix/mpeixish.h
index dc8cb1939a..e0375055eb 100644
--- a/mpeix/mpeixish.h
+++ b/mpeix/mpeixish.h
@@ -140,3 +140,16 @@ extern key_t ftok (char *pathname, char id);
 extern char *gcvt (double value, int ndigit, char *buf);
 extern int isnan (double value);
 extern void srand48(long int seedval);
+
+/* various missing constants -- define 'em */
+
+#define PF_UNSPEC 0
+
+/* declarations for wrappers in mpeix.c */
+
+#include <time.h>
+#include <sys/time.h>
+
+extern int ftruncate(int fd, long wantsize);
+extern int gettimeofday( struct timeval *tp, struct timezone *tpz );
+extern int truncate(const char *pathname, off_t length);